Xia Yuexin, a high school girl with a relatively well-off family life, meets the gentle and beautiful boy Ji Zichen by chance on her first day of high school. Xia Yuexin's cute appearance and simple heart make Ji Zichen fall in love with her deeply. However, Xia Yuexin's childhood sweetheart Bai Yifei shows disgust. At the same time, Xia Yuexin's best friends Duan Xiyao and Bai Yifei slowly collide with each other from enemies. From three years of high school to college, Ji Zichen, who was burdened with a huge mystery, suddenly disappeared. When he reappeared, he was completely changed. He was bloodthirsty, cruel, and cold, but he was still gentle to Xia Yuexin. However, there is a towering mountain range between Ji Zichen and Bai Yifei at this time. What kind of secret is there between them? What changes will happen to their relationship in the end? Stay tuned for "Summer Without Cicadas"